| 摘要 |
<p>A burst-mode optical transmitter (405) for receiving reverse electrical signals and for providing a reverse optical signal in a communications network. The optical transmitter includes a carrier-detect circuit (510) for detecting the presence of reverse electrical signals and a laser (535) for converting the reverse electrical signals into reverse optical signals for further transmission. The carrier-detect circuit (510) controls a switch (515), whereby when the carrier-detect circuit (510) detects the presence of reverse electrical signals, the carrier-detect circuit (510) closes the switch (515) activating the laser (535). When a reverse electrical signal is present, the carrier-detect circuit (510) opens the switch (515), deactivating the laser (535). In this manner, the burst-mode optical transmitter (405) only transmits reverse optical signals when reverse electrical signals are present. The reverse optical signals from a plurality of optical transmitters (405) can then be combined and transmitted further upstream via a single fiber path.</p> |
